The invention discloses a tool structure for realizing stable clamping of any axial flow blade. The tool structure comprises a base as well as a movable bracket and a fixed bracket arranged on the base; blades with different lengths can be fixed through adjusting the position of the movable bracket; blades with different cambers can be fixed through adjusting the position of a height adjusting seat; blades with different widths can be fixed through adjusting the position between two width adjusting seats; and blades with different thicknesses can be fixed through the depths, clamped in a wedge-shaped opening structure, of the leading edge and the trailing edge of a blade. The tool structure can realize stable clamping of the blade with any length, width, thickness and torsional angle, is high in adaptability and greatly lowers the detecting cost; all components can be disassembled and replaced, so that when the existing tool cannot meet the requirement or the component abrasion is moreserious, the usable or replaceable components can be efficiently designed and produced, and the detecting period is greatly shortened.